Dial-mat fastening for clocks



W. L. CHOU?! E. RUST.

DIAL MAT FASTENING FOR CLOCKS.

APPLICATION FILED OCT. 10, 1919.

Patented Apr. 192%.

UNITED STATES PATENT OFFICE.

WALTER L. CROUCH AND ARTHUR E. RUST, OF BRISTCL, CGNNECTICUT, ASSIGNORSTO THE E. INGRAHAll/f COMPANY, INC, OF BRISTCL, CONNECTICUT, ACORPORATION.

DIAL-MAT FASTENING FOR- CLOCKS.

Application filed October 10, 1919.

To all whom it may concern Be it known that we, WALTER L. CROUCH andARTHUR E. Rosa, citizens of the United States, residing at Bristol, inthe county of Hartford and State of Connecticut, have invented a new anduseful Improvement in Dial-Mat Fastenings for Clocks; and we do herebydeclare the following, when taken in connection with the accompanyingdrawings and the characters of reference marked thereon, to be a full,clear, and exact description of the same, and which said drawingsconstitute part of this application, and represent, in

Figure 1 a view in front elevation of a dial-mat constructed inaccordance with our invention and shown as applied to the dialboard of aclockrase, the sash having been removed.

Fig. 2 a broken view in side elevation on an enlarged scale, showing oneof the dialmat fastenings.

Fig. 8 an enlarged view in cross-section on the line 33 of Fig. 1.

Our invention relates to an improved fastening for the dial-mats ofclocks, the object being to provide a simple, cheap, convenient, andreliable means for fastening dial1nats in place without the employmentof screws passing through the mat and having their heads exposedthereupon so as to interfere with the closing of the sash.

lVith these ends in view. our invention consists in a dial-mat fasteninghaving certain details of construction as will be hereinafter describedand pointed out in the claims.

In carrying out our invention, as herein shown, the outwardly inclinedbearingflange 4; of the light sheet-metal deformable dial-mat 5 isformed with a pair of semicircular, fastening-perforations 6 and a pairof corresponding oppositely located perforations 7, the perforations ofthe respective pairs being located on opposite sides of the horizontalaxis of the dial. These perforations receive the rounded, overhangingheads 8 of pins 9 set into the dial-board 10 close to the edge of therecess 11 formed therein for the reception of the inwardly inclineddial-mat 5, the lower edge of which is formed with a bead or foot 12,resting upon the paper dial 13 which is supported upon a dial-plate 14,which in turn rests upon the leaf 15 of an angular retaining ring, theleaf 16 of which is secured to the outer Specification of LettersPatent.

Patented Apr. 6, 1920.

Serial No. 329,822.

face of the mat 5. But these details now being described have nothing todo with my present invention. The dial-mat is struck up to form a fiatshoulder 17 and carries a sash 18 secured to it by a hinge, one member19 of which is shown in Fig. 1. It will be observed by reference to Fig.3 that the fastening perforations 6 and T are located considerably belowthe plane of the flat shoulder 17. The sash mounts the dial-glass 20which is concave-convex in form as herein shown and held in place byclips 21 located within the sash 18.

In applying our improved dial-mat, the right-hand perforations 6 arehooked over the heads 8 of the two right-hand pins 9, after which theleft-hand portion of the mat is pressed down upon the rounded heads 8 ofthe two left-hand pins 9. Now as the mat is made of light sheet metal itwill spring and deform sufficiently to permit the heads of theseleft-hand pins to snap, so to speak, into the two left-hand perforations7. Or,-the left-hand perforations 7 may be hooked over the heads of theleft-hand pair of pins and the right-hand perforations 6 snapped overthe right-hand pair of pins, reversing the operation above described.When the pressure upon the mat is removed, it will resume its originalform with the result that the straight inner edges of its fourperforations will be engaged with the fiat underfaces of the roundedheads of the four pins, whereby the mat will be securely fastened to thedial-board, from which, however, it can be removed by springing it andso deforming it sufliciently to disengage it from one or the other ofthe two pairs of pins. By our improvement the pins are located so as notto interfere with the closing of the sash, whereas when screws have beenpassed down through the flat shoulder 17 of the mat their heads haveinterfered with the edge of the sash.

We do not limit ourselves to locating the perforations in the dial-matin the positions in which they are shown and described, nor to thenumber of perforations and pins employed, our invention comprehendingdeforming the dial-mat to permit it to be engaged with and disengagedfrom suitable fastening means mounted in the clock.

We claim 1. The combination with dial-mat fastening means mounted inthefront of a clock,

of a deformable dial-mat adapted when deformed under pressure to beengaged with and disengaged from the said fastening means after which itresumes its normal shape, its retention in place after engagement withthe said means being due to its resumption of its normal form.

2. A dial-mat fastening for clocks, consisting of a struck-upsheet-metal mat, having its outer flange provided withfasteningperforations for the reception of the heads of fastening pins.

3. The combination with a struck up sheet-metal dial-mat havingoppositely located fastening-perforations formed in its outer flange, offastening-pins having overhanging heads over Which the mat is hooked andsprung as described.

In testimony whereof We have signed this specification in the presenceof two subscribing witnesses.

VALTER L. CROUCH. ARTHUR 1t. RUST. \Vitnesses WM. P. HYNns, EDW.INGRAI-IAM.

